Episode 0 was plenty of fun, and no wonders if was bundled with Volume 7, considering those who didn't read the LN/manga would not even get the "huge incompatibility feeling" for the first 4 minutes
If AIC keep their stable budget management like they did for series like SoraOto, Haganai is probably going to be quite the treat... if only Sena and Yozora's seiyuu choices weren't that odd to me OTZ.